30% of 80 is 24. Three tenths: 0.3 × 80 = 24. Ten percent of eighty is eight, so 8 × 3 = 24—often the fastest mental line. Eighty is eight tens, and 30% of 10 is 3, so 8 × 3 = 24 again. Doubling a smaller base also works: 30% of 40 is 12, and 12 × 2 = 24. On the same eighty, 20% of 80 is 16 and 25% of 80 is 20, so thirty percent sits four units above the quarter in a clean integer ladder.
30% off £80 means the reduction is £24 and you pay £56 before extras. If someone asks only for thirty percent of eighty, the answer is 24, not fifty-six—fifty-six is what remains after the discount.
Five more than seventy-five: 30% of 75 is 22.5, plus 30% of 5 = 1.5 reaches 24. Double the base to one hundred sixty: 30% of 160 is 48, exactly 2 × 24 for a quick spreadsheet audit.
One third of eighty is about 26.67, not twenty-four—so “roughly a third” in conversation still overshoots thirty percent on this base.
If £80 is reduced by 30%, the reduction is £24 and you pay £56 (before other charges).
Change either value below to solve another percentage-of-number question instantly.
Formula used: (percentage ÷ 100) × number
Step 1: Convert 30% → 0.3.
Step 2: Multiply: 0.3 × 80 = 24.
Full formula: (30 ÷ 100) × 80 = 24
Ten-percent bridge: 10% of 80 = 8; triple it → 24. Same as 80 × 3 ÷ 10 if you multiply before dividing.
Eighty splits into ten equal eights, so each ten-percent slice is a whole 8 and thirty percent stacks three slices into 24 with no fractions. That makes eighty a favourite base for worksheets and till drills—big enough to feel “real,” still friendly for mental arithmetic.
Seventy percent remains after a thirty-percent cut: 80 − 24 = 56, or 0.7 × 80 = 56. If you see fifty-six pounds left from an eighty-pound sticker under a thirty-percent headline, you can infer the twenty-four-pound markdown without reopening the calculator.
Default: 10% of 80 = 8, then 8 × 3 = 24.
From 25% of 80 = 20, add 5% of 80 (4) → 24. From 15% of 80 = 12, double the rate mentally → 24.
Example 1: Thirty percent off an £80 hotel night
The saving is £24 and the reduced rate before fees is £56.
Example 2: Eighty-minute film slot
If you assign 30% of an eighty-minute block to credits and recap, that is 24 minutes on the timer.
Example 3: Workshop materials
A course budget lists £80 for supplies and sets aside 30% for contingency in a simple rule. That reserve is £24; the other £56 would cover the main list in that toy split.
Example 4: Small inventory
Eighty units ship and the plan samples 30% for quality checks in a proportional story. That is 24 units before rounding rules.
30% of 80 is 24.
Multiply 80 by 0.3, or find 10% of 80 (which is 8) and multiply by 3.
30% off 80 is a reduction of 24, leaving 56.
No. One third of 80 is about 26.67. Thirty percent of 80 is 24.
No. Thirty percent of 80 is 24. Increasing 80 by 30% means adding 24 to get 104.